Revert "reset: microchip-sparx5: allow building as a module"

This reverts commit b6b95858

.

This breaks MDIO on kswitch-d10, presumably because the global switch
reset is not released early enough anymore.

Reported-by: Michael Walle <michael@walle.cc>
Cc: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20220713084010.168720-1-p.zabel@pengutronix.de